src/BDSKicker.cc

#include "BDSGlobalConstants.hh" 

#include "BDSKicker.hh"
#include "G4VisAttributes.hh"
#include "G4LogicalVolume.hh"
#include "G4VPhysicalVolume.hh"
#include "G4TransportationManager.hh"

#include <map>

//============================================================

typedef std::map<G4String,int> LogVolCountMap;
extern LogVolCountMap* LogVolCount;

typedef std::map<G4String,G4LogicalVolume*> LogVolMap;
extern LogVolMap* LogVol;

//============================================================

BDSKicker::BDSKicker(G4String aName, G4double aLength, 
                     G4double bpRad, G4double FeRad,
                     G4double bField, G4double angle, G4double outR,
                     G4double tilt, G4double bGrad, 
                     G4String aTunnelMaterial, G4String aMaterial):
  BDSMultipole(aName, aLength, bpRad, FeRad, SetVisAttributes(), aTunnelMaterial, aMaterial,
               0, 0, angle),
  itsStepper(NULL),itsMagField(NULL),itsEqRhs(NULL)
{
  SetOuterRadius(outR);
  itsTilt=tilt;
  itsBField=bField;
  itsBGrad=bGrad;
  if (tilt==0)
    itsType="hkick";
  else if (tilt==pi/2)
    itsType="vkick";
  else
    itsType="kick";

  if (!(*LogVolCount)[itsName])
    {
      //
      // build external volume
      // 
      BuildDefaultMarkerLogicalVolume();

      //
      // build beampipe (geometry + magnetic field)
      //
      BuildBPFieldAndStepper();
      BuildBPFieldMgr(itsStepper,itsMagField);
      BuildBeampipe();

      //
      // build magnet (geometry + magnetic field)
      //
      BuildDefaultOuterLogicalVolume(itsLength);
      if(BDSGlobalConstants::Instance()->GetIncludeIronMagFields())
        {
          G4double polePos[4];
          G4double Bfield[3];

          //coordinate in GetFieldValue
          polePos[0]=0.;
          polePos[1]=BDSGlobalConstants::Instance()->GetMagnetPoleRadius();
          polePos[2]=0.;
          polePos[3]=-999.;//flag to use polePos rather than local track

          itsMagField->GetFieldValue(polePos,Bfield);
          G4double BFldIron=
            sqrt(Bfield[0]*Bfield[0]+Bfield[1]*Bfield[1])*
            BDSGlobalConstants::Instance()->GetMagnetPoleSize()/
            (BDSGlobalConstants::Instance()->GetComponentBoxSize()/2-
             BDSGlobalConstants::Instance()->GetMagnetPoleRadius());

          // Magnetic flux from a pole is divided in two directions
          BFldIron/=2.;

          BuildOuterFieldManager(2, BFldIron,0);
        }

      //
      // define sensitive volumes for hit generation
      //
      if(BDSGlobalConstants::Instance()->GetSensitiveBeamPipe()){
        SetMultipleSensitiveVolumes(itsBeampipeLogicalVolume);
      }
      if(BDSGlobalConstants::Instance()->GetSensitiveComponents()){
        SetMultipleSensitiveVolumes(itsOuterLogicalVolume);
      }

      //
      // set visualization attributes
      //
      itsVisAttributes=SetVisAttributes();
      itsVisAttributes->SetForceSolid(true);
      itsOuterLogicalVolume->SetVisAttributes(itsVisAttributes);

      //
      // append marker logical volume to volume map
      //
      (*LogVolCount)[itsName]=1;
      (*LogVol)[itsName]=itsMarkerLogicalVolume;
    }
  else
    {
      (*LogVolCount)[itsName]++;

      //
      // no rescaling ???
      //
 
      //
      // use already defined marker volume
      //
      itsMarkerLogicalVolume=(*LogVol)[itsName];
    }
}


G4VisAttributes* BDSKicker::SetVisAttributes()
{
  itsVisAttributes=new G4VisAttributes(G4Colour(0,0,1));
  return itsVisAttributes;
}


void BDSKicker::BuildBPFieldAndStepper()
{
  // set up the magnetic field and stepper
  G4ThreeVector Bfield(0.,-itsBField,0.); // note the - sign...
  itsMagField=new BDSSbendMagField(Bfield,itsLength,itsAngle);
  
  itsEqRhs=new G4Mag_UsualEqRhs(itsMagField);  
  
  itsStepper = new myQuadStepper(itsEqRhs);
  itsStepper->SetBField(-itsBField); // note the - sign...
  itsStepper->SetBGrad(itsBGrad);
}

BDSKicker::~BDSKicker()
{
  delete itsVisAttributes;
  delete itsMagField;
  delete itsEqRhs;
  delete itsStepper;
}

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